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Re: object graphics tvrd problem.... [message #64430 is a reply to message #64429]

Mon, 29 December 2008 12:26

ghgm2008
Messages: 17
Registered: December 2008

Junior Member

On Dec 29, 12:43 pm, David Fanning <n...@dfanning.com> wrote:
> ghgm2...@gmail.com writes:
>> I have an object graphics program and I want this to write a .png file
>> every minute - via a screengrab.
>> Under OSX this works fine - no problem... but on my main work machine
>> (LINUX) it grabs the screen too literally
>> - I get any windows in front - the screensaver - all sorts of stuff.
>
>> How do I make sure that the screengrab just grabs the correct window ?
>
> I would try showing the window before you take a snapshot
> of it. Maybe even waiting a second or so to give the graphics
> engine time to catch up:
>
> info.Main_Window -> Show, 1
> Wait, 0.75
> info.Main_Window -> GetProperty, IMAGE_DATA=snapshot
>
> Let me know if this works. :-)
>
> Cheers,
>
> David
>
> P.S. I would have thought setting RETAIN=2 on your Widget_Draw
> call would have solved the problem, though.
>
> --
> David Fanning, Ph.D.
> Fanning Software Consulting, Inc.
> Coyote's Guide to IDL Programming:http://www.dfanning.com/
> Sepore ma de ni thui. ("Perhaps thou speakest truth.")

Thanks for the help David...
Yeh, retain=2 doesn't do it and your show solution doesn't fully work
- the window does 'show' but the screengrab is still black in areas
where other
windows were covering.

I think it might be something to do with my graphics card -

Is there a way to do this with the Z-buffer ?

Cheers,

George.

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[Message index]

		Re: object graphics tvrd problem.... By: Rick Towler on Mon, 29 December 2008 17:16
		Re: object graphics tvrd problem.... By: David Fanning on Mon, 29 December 2008 12:51
		Re: object graphics tvrd problem.... By: ghgm2008 on Mon, 29 December 2008 12:46
		Re: object graphics tvrd problem.... By: David Fanning on Mon, 29 December 2008 12:39
		Re: object graphics tvrd problem.... By: ghgm2008 on Mon, 29 December 2008 12:26
		Re: object graphics tvrd problem.... By: David Fanning on Mon, 29 December 2008 11:43

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